GalaxyTab2AndGalaxyNexusBootloaderFreedom » History » Version 9
Denis 'GNUtoo' Carikli, 02/03/2020 01:18 PM
| 1 | 1 | Denis 'GNUtoo' Carikli | h1. GalaxyTab2Bootloader |
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| 2 | |||
| 3 | 7 | Denis 'GNUtoo' Carikli | h2. Galaxy Nexus (I9250) |
| 4 | |||
| 5 | To get the bootrom to try to boot on USB, you need to do the following: |
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| 6 | * Connect the USB cable to the device but make sure it's not connected on the computer. |
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| 7 | * Power off the device |
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| 8 | * Connect the USB cable |
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| 9 | |||
| 10 | 8 | Denis 'GNUtoo' Carikli | If we do that, we get the following in the kernel log of your laptop: |
| 11 | 7 | Denis 'GNUtoo' Carikli | <pre> |
| 12 | 8 | Denis 'GNUtoo' Carikli | usb 1-1: new high-speed USB device number 3 using ehci-pci |
| 13 | usb 1-1: unable to get BOS descriptor or descriptor too short |
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| 14 | usb 1-1: New USB device found, idVendor=0451, idProduct=d010, bcdDevice= 0.00 |
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| 15 | usb 1-1: New USB device strings: Mfr=33, Product=37, SerialNumber=0 |
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| 16 | usb 1-1: Product: OMAP4440 |
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| 17 | usb 1-1: Manufacturer: Texas Instruments |
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| 18 | usb 1-1: USB disconnect, device number 3 |
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| 19 | </pre> |
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| 20 | |||
| 21 | We can also try to get a bit more infos with omap-usb-boot: |
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| 22 | <pre> |
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| 23 | 7 | Denis 'GNUtoo' Carikli | # omap-usb-boot -w -v load u-boot.img |
| 24 | Finding and opening USB device |
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| 25 | Found and opened omap4 USB device: OMAP4440 |
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| 26 | ASIC device id: 4440, HS device |
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| 27 | Loading and executing u-boot.img... |
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| 28 | Loading data with length 369176 bytes |
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| 29 | Bulk USB transfer failed |
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| 30 | Loading and executing failed |
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| 31 | </pre> |
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| 32 | 8 | Denis 'GNUtoo' Carikli | |
| 33 | Here we know the device is signed because it's a "HS device". |
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| 34 | If it was not signed it would print "GP device" instead. |
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| 35 | 7 | Denis 'GNUtoo' Carikli | |
| 36 | 9 | Denis 'GNUtoo' Carikli | h2. Galaxy Tab 2 7" GSM (P3100) |
| 37 | 3 | Denis 'GNUtoo' Carikli | |
| 38 | To get the bootrom to try to boot on USB, you need to do the following: |
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| 39 | * Connect the USB cable to the device but make sure it's not connected on the computer. |
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| 40 | * Power off the device |
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| 41 | * Connect the USB cable |
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| 42 | |||
| 43 | If we do that, we get the following in the kernel log of your laptop: |
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| 44 | 4 | Denis 'GNUtoo' Carikli | <pre> |
| 45 | 1 | Denis 'GNUtoo' Carikli | usb 1-1: new high-speed USB device number 6 using ehci-pci |
| 46 | usb 1-1: unable to get BOS descriptor or descriptor too short |
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| 47 | usb 1-1: New USB device found, idVendor=0451, idProduct=d00f, bcdDevice= 0.00 |
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| 48 | usb 1-1: New USB device strings: Mfr=33, Product=37, SerialNumber=0 |
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| 49 | usb 1-1: Product: OMAP4430 |
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| 50 | usb 1-1: Manufacturer: Texas Instruments |
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| 51 | usb 1-1: USB disconnect, device number 6 |
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| 52 | </pre> |
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| 53 | 3 | Denis 'GNUtoo' Carikli | |
| 54 | We can also try to get a bit more infos with omap-usb-boot: |
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| 55 | <pre> |
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| 56 | omap-usb-boot -w -v load u-boot.img |
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| 57 | Finding and opening USB device |
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| 58 | Found and opened omap4 USB device: OMAP4430 |
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| 59 | ASIC device id: 4430, HS device |
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| 60 | Loading and executing u-boot.img... |
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| 61 | Loading data with length 369176 bytes |
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| 62 | Bulk USB transfer failed |
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| 63 | Loading and executing failed |
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| 64 | </pre> |
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| 65 | |||
| 66 | Here we know the device is signed because it's a "HS device". |
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| 67 | If it was not signed it would print "GP device" instead. |
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| 68 | 5 | Denis 'GNUtoo' Carikli | |
| 69 | 6 | Denis 'GNUtoo' Carikli | h2. TODO |
| 70 | |||
| 71 | 5 | Denis 'GNUtoo' Carikli | There might be some pointers and interesting infos in the following link: https://www.lukastomek.info/2018/11/05/UnBrick-Samsung-Galaxy-Tab/ |
| 72 | 6 | Denis 'GNUtoo' Carikli | |
| 73 | That link also points to an "u-boot port for the P5100":https://gogs.lukastomek.info/lukas/u-boot. |
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| 74 | |||
| 75 | TODO: |
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| 76 | * Read the first link and see what's interesting in it and add it on the wiki. |
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| 77 | * Look at how the u-boot port for the P5100 is supposed to run. Is the Xloader signed? |